减光子压缩真空态的相位概率分布

Phase probability distributions of photon-subtracted squeezed vacuum states

应用Pegg和Barnett提出的相位算符和相位态,研究了减光子压缩真空态的相位概率分布特性。数值计算结果表明,减光子压缩真空态的相位概率分布主要受到相位参数和压缩参数的调节,相位参数使相位概率分布呈峰值结构,压缩参数的变化将影响相位概率分布的峰值强度,此外减光子数对相位概率分布也有较大的影响。

Using the phase state and phase operator introduced by Pegg and Barnett, the phase probability distributions of the photon-subtracted squeezed vacuum states were investigated. Numerical results indicate that the phase probability distribution of the photon-subtracted squeezed vacuum states are mainly regulated by the phase parameter and the squeezing parameter. The phase parameter causes the probability distributions exhibiting peak and vale shape, and peak value is determined by the squeezing parameter. Furthermore, the phase probability distributions are influenced by the photon-subtracted number in a certain extent.